I don't think she would go for using an emulator. She said near the end of the video that the Amiga IS the artwork, and that she can only show her works on HER Amiga.
You're right, but then later she says that she'd love a 'modern' Amiga, too. I just could see someone giving her a Mac running an emulator and be like.. here you go!
My understanding is that she'd like to treat a new machine "on its own terms" -- but modern machines are too complex. AmigaBASIC and Amiga C address the machine's native capabilities.
A bit of retro-brite and a few spare parts in knowing hands might be more her thing. Or maybe the plotter that was discussed here on HN last week.
Reading the video comments, the creators of the video suggest that the artist was impressed by their A1200 and was interested in getting one, so I guess that's 7 years forward in terms of modernity. Besides that, there's the commonly accepted notion that limitation spurs on creativity.